Many battery powered devices use two AA alkaline cells. Often you will not know when it is time to replace the batteries until the device powered by them actually stops operating. The hobby circuit ...
How-To Geek on MSN
These are the first projects I made with my Arduino
One of the first projects that most people do on an Arduino is to light up or flash an LED. It seems ultra-simple because it ...
Here is a VLF receiver tuned to 300 kHz designed to detect the crackle of approaching lightning. A bright lamp flashes in sychrony with the lightning bolts indicating the proximity and intensity of ...
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